It’s even easier than Super Mario RPG on the SNES! But with that being said, it’s still a very enjoyable experience. The gameplay mechanics are executed pretty well, and the game is a lot of fun, but it has a problem which bothers people like I, and is very common among Mario games it’s waaaaaaaaaaaaaay too easy. You obtain one in each chapter of the game. The only way to open the Thousand Year Door is to collect all of the crystal stars. The treasure is behind the Thousand Year Door. Rogueport is a treacherous town with infamous thieves. Mario sets out on water to a town known as Rogueport. The plot of the game is that you’ve received a treasure map from Peach, and that she wants you to join her on the journey. Paper Mario TTYD is the Mario RPG for the Gamecube.